body{
    background-color: #fafafa;
    font-family: '微软雅黑';
}

.canvas{
    background-color: white;
    border: 1px solid lightgray;
    float: left;
}

.control-panel{
    overflow: hidden;
}

input[type=range]{
    padding-left:0;
    padding-right: 0;
}